Preparation and Performance Study of SrLSX Molecular Sieve by Ion Exchange Method

Abstract Oxygen is widely used in many fields. The mainstream oxygen production method is pressure swing adsorption (PSA). The LiLSX molecular sieve is recognized as the best-performing PSA oxygen-generating molecular sieve material. However, with the rapid development and popularization of electric vehicles and the substantial demand increase for energy storage amid the development of renewable energy, the demand for lithium-ion batteries is also increasing sharply. Hence, lithium-containing LiLSX molecular sieves are also becoming expensive. In this study, the SrLSX molecular sieve material was prepared using an ion exchange method. This material has the same FAU crystal structure as LiLSX and NaLSX, and its PSA oxygen production performance is similar to that of the LiLSX molecular sieve, much higher than NaLSX. It also shows better stability at high temperatures than the LiLSX molecular sieve. Considering the economic benefits and efficiency of PSA oxygen production, SrLSX is a promising molecular sieve material for PSA oxygen production.